Valve operating mechanism



Jan. i7, 1939. E. c, BRISBANE v 2,144,305

VALVE OPEATING MECHANISM EUGENE c. B RISBANE Jan. 17, 1939. A

E. c` BRISBANE 2,144,305

VALVE OPERATING MECHANISM Filed Aug. 6, 1957 4,Sheets`-Sheet 3 GENE C.BRISBANE i y Jan. 17, 1939.

E. c. BRISBANE VALVE OPERATING MECHANISM Fi]4.ed Aug. 6, 193'?`lisheecs-Sheet, 4

vALvE cLosED 4 0 p u's mwenA 1 VALVE cLosED 40 PLUG uNsEATED '.78

. VALVE open PLUG UNSEATED 1 Snvcntor 40 cavity I2 formed therein for atapered .plug I3,

Patented Jan. 17, 1939 UNITED STATES VALVE OPERATING MECHANISM Eugene C.Brisbane, Denver, Colo., assigner to S.

Morgan Smith Company, vYork, Pa., a corporation of-PennsylvaiaApplication. August 6, 1937, Serial No. 157,643

4:a claims. (o1. 74P-2o) This invention relates to valves, andmoreparticularly to taper plug valves having power operated mechanism foroperating the valve plug.

in object of the invention is to provide an improved actuating mechanismfor a valve of the type adapted to be raised, turned and reseated.

Another object of the invention is to provide an improved valvestructure which includes a rotatable plug having a shaft with a slottedrotor mounted thereon a collar keyed to the plug shaft to rotatetherewith, and means operatively associated with the rotor and withthecollar for operating the same in such a manner that the valve plug isrstmoved axially to unwedge the same, then rotated to its open or closedposition, and then moved axially to rewedge the same.

With the foregoing and other objectsand advantages Vin view, theinvention consists in the preferred construction and arrangement of theseveral parts which will be hereinafter more fully described andclaimed.

. In the accompanying drawings: v

Figure 1 is a vertical longitudinal section through a valve constructedin accordance with the present invention, showing the same in closedposition;

Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1;

Fig, 3 is an exploded perspective of the elements associated with thevalve shaft for operating the same; v

Figs. 4 to '1 inclusive and Figs. 8 to 11 inclusive are schematic viewsin corresponding pairs to show successive stages in the operationof thevalve from closed to open position.

Referring to the drawings, the improved valve comprises a 'main body orcasing Il having a the cavity -being intersected by a longitudinalWaterway or opening I4, indicated by dotted lines in Fig. 1, whichopeningconstitutes a passage 4through the valve. The plug I3 hasapassage I3 formed 'therein of substantially the-same diameter as thevalve passage I4, so' that when `the plug is in open position, a uniformbore will extend through the valve from end to end.

The valve plug I3 may be equipped with seat rings I1 which are adaptedto engage seat rings I8 mounted in' the body II -so as vto provideatight joint between the valve body and the plug when the plug is in 'itsseated or wedged position.

Ihe tapered plug I3 is supported for both axial and rotary movementA inthe valve body Il.

At its inner or smaller end, the plug I3 is formed with an extensionwhich constitutes a trunnion 2li having an opening 2l formed therein forthe reception of a stem or spindle 22, projecting inwardly from Ithesmaller end of .the valve body Il.

At itsy outer or larger end, the plug I3 is formed with'a cylindricalboss 23 having a bore 211I formed therein for the reception of one endof a valve shaft 25, keyed to the plug I3 by means .of a pair of pins 26which are inserted in alined grooves formed, respectively, in the 'boss23 and the valve shaft 25, as shown in Fig. 1.

The boss 23 is journalled in a bushing 21 mounted in an opening28.formed centrally in a web 23 of a housing 30 attached to the valvebody II, said bushing constituting a bearing for the valve plug and itsshaft, and said web constituting a cover plate for the larger end wofthe valve body. The housing 30 constitutes a closure for the valveoperating mechanism. A packing gland 3l, fastened to the outer side ofthe web 29, prevents leakage of uid around the boss 23. v

In the present instance, the valve shaft 2 5 is shown as being formedwith a plurality of sections which successively decrease in diameterfrom the boss 23' of the plug outwardly. The largen section of the valveshaft is indicated by -the reference numeral 25.

The other sections 32, 33 and 34 are constructed of less diameters thanthe portion 25. The shaft 25 also has a reduced section 35 mountedwithin the boss 23.

-Mounted on the portion 32 of the valve shaft is a thrust collar 36,said collar being keyed to the valve shaft by keys 31 (see Figs. 1 and2).

The thrust collar 36 is formed with a; pair of diametrically disposedopenings 38, in which openings are mounted lifter pins 39 (see Fig. 3).Also mounted on the portion 32 of the valve shaft is a second collar 40,which is keyed to said shaft by the keys 31.

The collar 40 has a member 4| projecting laterally therefrom andconstituting a rotator lever, the outer periphery of which is formedwith a crotch of somewhat V-shape having curved sides 42 and 43 and anapex 44.

The portion 33 of the valve shaft is threaded for the reception of a nut45 which is screwed down tightly so that the collars 36 and 40 will beclamped tightlybetween the inner face of the nut and a shoulder 46formed on the shaft between the portions 25 and 32 thereof (see Fig. 1).

Ament pin 55.

Rotatably mounted on the collar is a sleeve 41, constituting a rotor.The sleeve is quite long and has its inner end bearing against a web 49formed as a part of the housing 30 and surrounding the valve shaft 25,and its outer end bearing against a tubular boss 49 formed on a cover50, said boss surrounding the portion 34 of the valve shaft. Y

The sleeve 41 has formed therein diametrically disposed V-shaped slots59, in which are disposed the extending portions of the pins 39 carriedby the collar 35. The disposition of the slots 59 is such that when thevalve plug I3 is in closed and seated position in the casing Il, thepins 39 are disposed in one end portion of the slots when the valve plugis unseated, the pms ss will be .dis-

posed in the intermediate or apex portion of said slots, and when thevalve plug is again reseated in open position, the pins 39 will bedisposed in the other end of said slots`59.

The sleeve 41 is formed with a leve'r having a pair of arms 5|, saidarms straddling the rotator lever 4| heretofore referred to. A

The arms 5| are formed with slots 52 having parallel side walls, theinner ends of said slots being arcuate in form, as indicated at 53 (Fig.3).

The slots 52 of the lever 5| receive the two reduced ends 54 of anescapement pin 55.

The housing 311s formed with a lower arcuate wall 55 which wallsurrounds the lower portion of thev valve operating mechanism. Carriedby the wall-59 is an arcuately shaped member 51, having an upper camsurface 59, for guiding the escape- The portion of the sleeve 41diametrically disl posed with respect to the lever 5|, is'formed withteeth 5|, said teeth being in the form of a sector, as shown in Fig. 2.

The sector teeth 5| of the sleeve 41 are in meshing relationship withthe teeth of a rack bar 52, carried by a rod 53.

One end of the rod 53 is connected to av piston 54 in a cylinder 55, andthe other end of the rod 53 is connected to a piston 55 in a cylinder51. The pistons and their respective cylinders are opposed, as showninFig. 2.

Chamber 59 on the outer end of the cylinder 55 has a port 59, andchamber 10 on the outer end of cylinder 51 has a port 1|. The ports 59and 1| may be connected to suitable mechanism (not shown)controlling'uid under pressure for alternately operating pistons 54 and55, so that the rack 52 will be reciprocated, and thereby operate thegear sector 5|.

The portion 34 of the valve shaft is journalled irl-a bushing 12 carriedby the cover 50, the ex-l tremity of the valve shaft projecting throughsaid cover and having xed thereto an indicator arm 13 adapted toindicate the position of the valve plug.

As shown in Figs. 2, '4 and 8, when the valve plug is in closed andseated position, the pin 55 will be disposed on `the cam surface 14 ofthe pin guide member 51, the reduced end portions 54 of the pin beingdisposed near the outer ends of the slots 52 of the levers 5|, and thearcuate portion 15 of the pin 55 being in contact with the curvedsurface-42 ofthe lever 4I, Also, the pins 39 will be disposed in theends 15 of the slots 59 in the sleeve 41. In this position of the valveplug,

the tip of the curved surface 42 of the lever 4| engages a stop 11.

When it is desired to turn the vplug I3 from closed to open position,the control valve mechanism (not shown) is operated to connect pistonchamber. 10 toa sewer or other suitable free dis-v charge, and fluidunder pressure is supplied to piston chamber 59. Pistons 54 and 55 andrack bar 52 will then be moved toward the right in the direction of thearrow, Fig. 2. 'I'his movement of the rack bar 52 from left to right,effects l rotation of the sleeve 41 in a clockwise direction,

with the result that the pin 55 is moved along the c'am surface 14, saidpin traveling inwardly of the `55 with the surface 42 of the lever 4|.

During the initial movement of the sleeve 41, the pins 39 are moved awayfrom the ends 15 of the slots 59, and due to the shape of said slots,

the pins 39 will be drawn or moved in la. direction axially of the valveshaft, as indicated by the arrow, Fig. 1, and in so moving, said pinswill effect an axial or longitudinal movement of the valve shaft 25 andthe plug I3, thereby unseating said plug.

When the parts are in the position shown in Figs. 5 and 9 with the pin55 in the apex 44 of the crotch .of lever 4Il the lever 5I| will belocked to the lever 4| so as to carry the same in its subsequentrotation. Y

Figs. 6 and 10 show the position of theparts at the end of the nextperiod of rotation of the sleeve 41.A During this angle of rotation thecollars 35 and 4 0, the sleeve 41, valve plug shaft 25, and valve plug|3 move together and the parts remain in the same relative position. Atthe end of this period of rotation, the valve is open but the plug I3 isstill lifted from its seat. I

At the left end of the cam surface 59, the pin guide member 51 is formedwith a cam surface 19 having such a contour as to effect an outward ordownward movement of the pin 55 away from the apex of the notch 44 inthe lever 4|.'

Figs. 7 and 11 show the position of the parts at the` end of the finalrotation of the sleeve 41. During the final period of rotation of thesleeve 41, the plug |3 is locked from rotation since the pin travels tothe outer ends of the slots 52, guided by the surface 18 of the pinguide member 51 and the curved surface 43 of the lever 4|. In this finalperiod of rotation of the parts during which the plug -shaft 25 does notturn, the lifting pins 39 lare carried tothe ends 19 of the V-shapedslots 59 in the sleeve 41 whereby said plug shaft is forced down forseating thelplug i3. At the end of said operation the tip of the curvedsurface 43 of lever 4| engages stop 90 and the valve is open and theplug seated.

- The reverse of the above described operation takes lplace in closingthe valve.

Having. thus described my in'vent'ion, what I claim is: l

side walls, an escapement pin operatively associated with said forkedlever Jand said rotator lever, means for rotating said sleeve and itsforked lever, and a stationary pin guide member' having cam surfaces forguiding said pin along the peripheral crotch of said rotator leverwhereby in extreme angular positions of said sleeve the rotator leverwill be uncoupled from the sleeve and in the intermediate position ofrotation of said sleeve said rotator lever will b e interlocked with thesleeve. Y

2. Actuatingimeans for a shaft adapted to be moved in a straight line apredetermined distance and then rotated at the completion of thereciprocating movement through a predetermined arc, comprising a collarxed'to said shaft and nhaving'a pair of pins projecting laterallytherefrom, a sleeve rotatably mounted on said collar, said sleeve havingVf-shaped slots for said pins and a forked lever projecting laterallytherefrom, a rotator lever keyed to said shaft and having -a peripheralV-shaped crotch. an escapement pin peratively associated with saidforked v lever and said rotator lever, means for rotating said sleeveand itsvforked lever, and a stationary pin guide member having camsurfaces for diwhereby said rotator lever will be interlocked with saidsleeve during the intermediate portion of the rotary movement of thesleeve and said EUGENE c. BR'JSBANE.-

lrecting said escapementpin into Vand out of said crotch during rotarymovement of said sleeve

